Machine for milling cone-screw wheels.



No. 645,427. Patented Mar. l3, I900.

E. PIJLANGWSKI.

MACHINE FOR MILLINGVCUNE SCREW WHEELS.

(pplication filed Dec. 21, 1897.)

2 SheetsSheet I.

(No Model.)

THE Nonms r nzns go. PHO'YO-LIYHO wAsnmaToN, 0. c,

No. 645,427. Patented Mar. 13,1900. E. POLANOWSKI.

MACHINE FOR MILLING; CONE SCREW WHEELS.-

(Application filed Dec. 21, 189?.v

2 Sheeis-$heet 2.

(No Model.)

m: NORM! PETERS ca. Pno'rouma, WASHINGTON a. c.

'tion taken at right angles thereto.

F F ICE.

EUZEBIUSZ POLANOWSKLOF LODZ, RUSSIA.

MACHINE FOR MILLINGCONE-SCREW WHEELS;

SPECTFIGATION forming part of Letters Patent No. 645,427, dated March13, 1900. Application filed December 21, 1897. Serial No. 662,839. (Nomodel.)

To all whom it may concern..-

Be it known that I, EUZEBIUSZ POLANOW- SKI, a subject of the Emperor ofRussia, residing at Lodz, Russia, have invented certain new and usefulImprovements in Machines for Milling Gone-Screw Wheels, (patented inGermany, No. 95,511, October 7, 1896; in Belgium, No. 124,483, November9, 1896; in Hungary, No. 9,881, July 1,1897; in Austria, No. 47/4,009,October 16, 1897; in England, No. 15,351, June 26, 1897; in France, No.268,650, July 10, 1897; in Switzerland, No. 14,992, July 15, 1897, andin Canada, No. 61,209, September 19, 1898,) of which thefollowingisaspecification.

This invention relates to a machine which has for its object to mill outthe periphery of conical disks in such a manner as to producecone-wheels orbevel-wheels having helicallyarranged teeth. The machinecan also be employed for finishing (by milling) cast conescrew wheels.

This machine is characterized by the fact that the cone-disk to bemachined makes a slow partial rotation about its axis and is during suchmotion out out along the generatrix of its cone-surface by a rotatingmilling cutter or tool, which moves in a straight line and the axis ofrotation of which is situated,

together with the axis of the cone-disk, inv

the same plane in which the two axes form an acute angle to each other.The result of this arrangementis that the milling-tool works correctlyduring the partial rotation of the cone-disk and the teeth are taperedin the requisite manner.

A form of construction of this machine is illustrated in theaccompanying drawings.

Figure l is a vertical longitudinal section on the line a b of Fig. 2.Fig.2 isa cross-sec- Fig. 3 is an elevation looking from left to rightin Fig. 2 of the apparatus which receives and slowly rotates thecone-disk to be machined. Fig. 4 is a diagram showing the angle of theaxes of rotation of the tool and the-cone-disk to be machined.

The part of the machine shown in Fig. 1 and on the left hand in Fig.2contains at the top a horizontal shaft 1, which carries on its end (onthe left-hand end in Fig. 1) a loosestepped driving-pulley 2, which isconnected,

either directly or by means of the gearing 4, with the spur-wheel 3,fixed on the shaft 1, according as the shaft 1 is required to rotatequicker or slower. The shaft 1 extends through the two bearing-standards5 of a support 6, which is movable on the bed 7 in the direction of thelength of the latter. Between the bearing-standards 5 there is mountedon the shaft 1- a screw-wheel 8, which shares the rotation of this shaftand also the movement of the support 6. This screw-Wheel engages with asecond screwwwheel 9, which is mounted at right angles to thefirst-mentioned wheel, also in the support 6 on the shaft 10 of themilling-cutter 11, Fig. 2, and causes this cutter to rotate. Aspur-wheel 12, mounted on the other end (right-hand end in Fig. 1) onthe shaft 1', drives, by means of the gears 13 14 15 16 17 18,ascrew-spindle 19 and through the latter moves the support 6 along itsbed 7. The three wheels 17- of the above-men v tioned gear are adaptedto be revolved or partially revolved about the axis of the wheel 16 andare shifted in the usual manner each time that the direction of themotion of the support 6 is to be reversed. The said three wheels 17 haveequal diameters and are mounted on a frame, which can be swung about theaxis of the wheel 16. Of the said three wheels 17 the uppermost one andthat on the left-hand side in Fig. 2 engage permanently the wheel 16,and the lowest wheel 17 gears permanently with the wheel 17 on theleft-hand side of Fig. 2. When the frame carrying the said three wheels17 is in the position shown in Fig.2, then the uppermost wheel 17 gearswith the wheel 18 of the screwspindle 19, rotating it in the samedirection as that in which the wheel 16 rotates and moving the support 6one way, (forward;) but when the said frame has been swung upward thenthe uppermost wheel 17 is disengaged from the wheel 18, whereas thelowest wheel 17 is brought into engagement with the wheel 18, which,together with 'the spindle 19, is then turned in the opposite directionas that of the rotation of the wheel 16, thus moving the support 6 theopposite way, (backward) The bed 7, Fig. 1, of the support 6 is capableof being moved transversely to the direction of its length along asecond bed 20 by means of the screw-spindle 21. The spurwheel 18 of thescrew-spindle 19 rotates a spur-wheel 22, which is situated under it andwhose shaft 23 carries on its other end a bevelwheel 24, which engageswith the bevel-wheel 25 on the shaft 26. The movement of this shaft istransmitted by means of the spurwheels 27 and 28 to a shaft 29, which inits turn rotates, by means of the spur-wheels 30 and 31, a screw-spindle32. This spindle moves another support 33 along its bed. This supportreceives the cone-disk to be machined. Through its center there extendsa vertical shaft 34, which receives rotation from below from the spindle32 by means of the bevelgearing 35 36. At its upper end this shaft 34carries a spur-wheel 37, and this wheel gears in a larger spur-wheel 38,which is mounted loose upon a shaft 39, that is parallel to the shaft34. The wheel 38 carries on its upper face a dividing-disk 40, providedwith concentric rows of holes. This dividing-disk 40 is fixed to theWheel 38 and is coupled by means of the pin 41, which is inserted in oneof the holes of the corresponding row of holes, with a crank 42, whichis fixed to the shaft 39. Below there is mounted on the shaft'39 a worm43, which gears with a Worm-wheel 44 to which the conedisk to bemachined is fixed. The shaft 39 drives, by means of the spur-wheels 4546', a second shaft 47, Fig. 2, which is parallel to it and which moves,by

means of a worm 48, a smaller worm-wheel 49.

This latter serves to receive cone-disks of small sizes.

Each of the two worm-gears 43 44 and 48 49 is adjustable vertically andalso both are capable of rotating with the whole wheel-gear upon thebase-plate of the support 33, driven by the shaft 34 about the latter,the arrangement being such that the upper part of the support is guided,by means of the dovetail shaped heads of the attachment-screws, in asuitable annular groove in the base-plate of the support. By this meansthe cone-disk which is to be machined and which is fixed on therespective worm-wheels 44 or 49 and of which a broken-off portion isindicated in Fig. 2 on the left of the wheel 44 can be set at the properheight and at the proper angle to the milling-cutter 11. In order to setthe second support at the proper distance from the milling-cutter, thecone-wheel 35, which is mounted on the corresponding spindle 32 andisprovided with an internalscrew-thread, must be uncoupled from saidspindle by the removal of the wedge 50. Then by rotating the spindle 32the second support can be pushed forward or rearwardby rotating thespindle 3:3 until the support is in the proper position. The Wedge 50 isthen reinserted. It should be noted that the spur-Wheels 30 and 31,which drive the spindle 32 of the second support, must be changed tosuit the desired pitch in each case of the screw-teeth to be cut.

The adjustment or setting of the rotating milling-cutter with referenceto the work is elfeete'd in the same manner as the adjustment of anordinary lathe-cutter.

In Fig. 4, 11 is the cutting-tool, and d d the cone-disk. The axis ofrotation cf of the tool forms with the axis of rotation f g of theconedisk the acute angle 7t. The line i tindicates the direction inwhich the cutting-tool is displaced. In the cone-disk it is indicated atIt by hatching, which part is to he removed by the cutting-tool.

I claim as my invention and desire to secure by Letters Patent 1. In amachine for milling bevel-wheels so as to produce or finishhelically-arranged teeth the combination of a worm-wheel, carrying thecone-disk to be machined, a cutter rota table about its longitudinalaxis and movable in the direction of its axis and at right angles to it,means acting simultaneously upon the said cutter and the said worm-Wheelin such a manner, as to rotate the said cutter, to moveit at rightangles to its longitudinal axis and to impart a slow partial rotation tothe said worm-wheel, and means of adjusting the said cutter in thedirection of its longitudinal axis, substantially as described.

- 2. In a machine for milling bevel-Wheels so as to produce or fi nishhelically-arranged teeth the combination of a worm-wheel, carrying thecone-disk to be machined a cutter rotatable about its longitudinal axisand movable in the direction of its axis and at right angles to it,means acting simultaneously upon the said cutter and the said Worm-wheelin such a manner, as to rotate the said cutter to move it at rightangles to its longitudinal axis, and to impart a slow partial rotationto the said worm-wheel, means of adjusting the said cutter in thedirection of its longitudinal axis and means of adjusting the saidwormwheel with regard to the said cutter, substantially as described.

3. In a machine for milling bevel-Wheels so as to produce or finishhelically-arranged teeth the combination of the worm-wheel carrying thecone-disk to be machined, a cutter rotatable about its longitudinal axisand movable in the direction of its axis and at right angles to it,means acting simultaneously upon the said cutter and the said worm-Wheelin such a manner as to rotate the said cutter.

to move it at right angles to its longitudinal axis and to impart a slowpartial rotation to the said worm-wheel, means of adjusting the saidcutter in the direction of its longitudinal axis and means of adjustingthe said wormwheel with regard to the said cutter, vertically,horizontally, and rotating about a vertical axis, substantially asdescribed.

In testimony whereof'I have signed my name to this specification in thepresence of two subscribing witnesses.

EUZEBIU'SZ POLANOWSKI. [1,. SI]

lVitnesses:

ADOLF JAHN, HEINRICH MAnxERr.

